US4602514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measuring the volume flow of a gas in a duct
Assignee: FERDINAND SCHAD KG
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Filing: 1984-10-11
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Granted: 1986-07-29
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Expires: 2004-10-11
Abstract
Abstract A device for measuring the volume flow of a gas in a duct for making it possible to effect adjustment or balancing at the manufacturer's location and then being installable in a duct at any desired location without leading to varied measurements by providing a plurality of evenly distributed polygonal collecting pipes with unilaterally arranged flow entrance ports connected with a compact unit. A flow baffle is arranged at the entrance point of the collecting pipes, and a nozzle is arranged downstream of the flow rectifier. The measuring probe is located downstream of the nozzle in the measuring unit.
Inventors
- 👤 Hermann Kurrle
- 👤 Wolfgang Ruf
- 👤 Adelbert Zeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:53
CPC Classifications
G; G01; G01F; G01F5/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
110 words
Device for measuring with a probe the volume flow of a gas in a duct, comprising a measuring means having a plurality of collecting pipe distributed substantially evenly over the duct passage and extending perpendicular to the axis of the duct passage, the collecting pipes having flow entrance ports oriented in opposition to the gas flow; a tubular housing having a measuring chamber in which the collecting pipes terminate and in which a measuring probe is arranged for measuring the gas flow; and fins provided on the collecting pipes at each side of the flow entrance ports and extending in opposition to the gas flow to define an entrance orifice.
Claim 2
Dependent Claim
110 words
Device for measuring with a probe the volume flow of a gas in a duct, comprising a measuring means having a plurality of collecting pipe distributed substantially evenly over the duct passage and extending perpendicular to the axis of the duct passage, the collecting pipes having flow entrance ports oriented in opposition to the gas flow; a tubular housing having a measuring chamber in which the collecting pipes terminate and in which a measuring probe is arranged for measuring the gas flow; and fins provided on the collecting pipes at each side of the flow entrance ports and extending in opposition to the gas flow to define an entrance orifice.
Claim 3
Dependent Claim
13 words
Device according to claim 1, wherein the collecting pipes are polygonal in shape.
Claim 4
Dependent Claim
12 words
Device according to claim 2, wherein the collecting pipes are square pipes.
Claim 5
Dependent Claim
41 words
Device according to claim 1, wherein the ratio of the height of the collecting pipes perpendicular to the flow direction of the gas to the width of the collecting pipes extending in parallel to the gas flow is smaller than 1:4.
Claim 6
Dependent Claim
15 words
Device according to claim 1, wherein the collecting pipes are arranged in a stellate pattern.
Claim 7
Dependent Claim
15 words
Device according to claim 1, wherein the collecting pipes are arranged in a grid-like pattern.
Claim 8
Dependent Claim
33 words
Device according to claim 1, wherein the measuring chamber is located in the center of the collecting pipes and is covered by a cap on the front side facing away from the probe.
Claim 9
Dependent Claim
19 words
Device according to claim 1, wherein the measuring chamber is located via connecting conduits laterally of the collecting pipes.
Claim 10
Dependent Claim
13 words
Device according to claim 8, wherein the connecting conduits form a ring conduit.
Claim 11
Dependent Claim
11 words
Device according to claim 1, wherein four collecting pipes are provided.
Claim 12
Dependent Claim
27 words
Device according to claim 1, wherein the flow entrance ports are distributed in a logarithmic pattern from the outer end of the collecting pipes toward the interior.
Claim 13
Dependent Claim
27 words
Device according to claim 1, wherein baffles are provided in the measuring chamber to deflect the gaseous flow conducted by the collecting pipes to the measuring chamber.
Claim 14
Dependent Claim
17 words
Device according to claim 1, wherein the fins are oriented in parallel to the primary gas flow.
Claim 15
Dependent Claim
16 words
Device according to claim 1, wherein four collecting pipes are provided to form a stellate arrangement.
References Cited (Backward Citations)
US3398765A
Cited
US3581565A
Cited
US3559482A
Cited
US3803291A
Cited
US4036054A
Cited
US4372171A
Cited
US4444060A
Cited
US4476729A
Cited
US4453419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |